/*
* @Author: Administrator
* @Date:   2018-11-12 16:22:44
* @Last Modified by:   Administrator
* @Last Modified time: 2018-11-20 09:16:18
*/
*{
	padding: 0px;
	margin: 0px;
	list-style: none;
}
html,body{
	width: 100%;
	height: 100%;
	font-family: "宋体",Georgia,Serif;
}
/*导航栏*/
.topDiv{
	width: 100%;
	height: 75px;
	position: absolute;
	z-index: 1;
}
.topDivFixed{
	position: fixed;
    left: 0;
    top: 0;
    background: rgba(255,255,255,0.7);
}
.current{
	width: 800px;
	height: 75px;
	margin-left: 150px;
}
.current>li{
	display: inline-block;
	width: 100px;
	height: 75px;
	text-align: center;
	font-size: 20px;
	position: relative;
	margin-left: 20px;
	/*  */
}
li>a{
	display: inline-block;
	width: 100%;
	line-height: 75px;
	text-decoration: none;
	color: #333;
	font-weight: bold;
}
.current li:hover{
	background-color: #12b7f5;
}
/*简介1*/
.titleDiv{
	width: 100%;
	height: 620px;
	position: relative;
}
.titleDiv>div{
	width: 100%;
	height: 100%;
	position: absolute;
	z-index: -1;
	background-size: cover;
	background-repeat: no-repeat;
	transition: all .35s;
}
.introduction1{
	background-image: url("../images/topic-01.jpg");
	background-position: 100%;
	opacity: 1;
}
.introduction2{
	background-image: url("../images/topic-02.jpg");
	opacity: 0;
}
.introduction3{
	background-image: url("../images/topic-03.jpg");
	background-position: 100%;
	opacity: 0;
}
.introduction4{
	background-image: url("../images/topic-04.jpg");
	background-position: 50%;
	opacity: 0;
}
.introduction{
	opacity: 1;
}













.bgimg{
	background-size: cover;
	background-repeat: no-repeat;
}
.firstScreen{
	width: 100%;
	box-shadow: 0 -5px 50px;
}
.topic{
	width: 100%;
	height: 280px;
	
}
.bgimg{
	width: 100%;
	height: 600px;
	position: relative;
	background-attachment: fixed;
	// transition: all .5s;
}
.descriable{
	width: 100%;
	height: 580px;
}
.screen1{
	background-image: url("../images/bg-01.jpg");
	background-position: 0 30px;
}
.screen2{
	background-image: url("../images/bg-02.jpg");
	background-position: 30% 100px;
}
.screen3{
	background-image: url("../images/bg-03.jpg");
	background-position: 0 150px;
}